If you target a niche they can be great for traffic, don't try and do a "porn" blog where you take a stab at everything since that might as well be a tgp. A good way to have updated "content" is approach it as a tgp type thing. Every other day or so place a link to a site with free pics or just post a few pics on the blog page. Also things like hot sex products (toys, condoms, reviews etc). Having female members send in pics of them in some erotic poses also helps out alot
